Dry battery



- A. T. BALDWIN DRY BATTERY Filed March 17. 1923 INVENTOR fiL E T BflLDW/A/ LZY/MM A TTOR N E Y5 Patented Aug. 31,- 1926'.

UNITED STATE 1,598,111 PATENT OFFICE.

ALLEN 'r; annwm, or uon'rcuiannw JERSEY, ASSIGNOR, .BY mnsnn ASSIGN- v MENTS, '10 NATIONAL CARBON GOMPANY, INC., OF NEW YORK, N. Y., A CORPORA- TION 01 NEW YORK.

DRY nar'rniw.

manned latch 17, 1923. Serial No. 625,846.

M invention relates to dry batteries, and particularly to .a casing therefon The object of my invention is to provide a simple and economical casin of such construction 5 that access cannot be ad to the battery terminals for theft of current without a telltale rupture of the casing. n v

In the accompanying draw1ng s-' Figure 1 is a broken elevation of a battery and casing to which my invention 1s applied in one form; and

Fig. 2 is an inverted plan of the sealing cap at the terminal end of the casing;

While I am aware that it has been itherto proposed to cover one of the battery terminals to revent surreptitious connection thereto and partial or complete exhaustion of the battery before it reaches the, purchasers hands, such constructions have not proved practically efiicient, or have been of such expensive character as to prohiblttheir use. There is at the present time no inexpensive and efiicient sealed container on the market for batteries of the invention relates, which accomplishes the desired result. My invention provides a seal, which, the expense of the casing, e ectlvely accomplishes the desired object.

- In the form shown, the battery pro or 13 of common type, comprising a cylin rical zinc shell 3 having at one end an associated terminal 4, and also a control carbon bar or the like (not shown) having an associated terminal 5 at the same end of the battery.

Both wire terminals roject beyond the end of the battery body efined by the shell '3.

Surrounding the shell 3 is an insulating paper or frangible fiber casin 6, sealed at the lower end of the battery y the cap- 7, and at the terminal end by the cap 8. In-

asmuch as the cap 8 must be spaced from the body of the batte to afford clearance for the terminals 4 an 5, I provide it with. a supporting ring 9 which surrounds the central terminal 5 and reinforces the central area of the ca 8 against breakage incident to the hand mg and shipment of the batte pressure of the cap flange.

type to which the without addin appreciably to;

shell, in combination with a fran nals against access, said casing bein t scored at 10 at a point substantially coincident with the end of the shell 3 of the batrupturing the casing on the score line 10,

whereupon the cap may be removed to expose the terminals 4 and 5. The rupture of the casing on. the line 10 is facilitated by reason of the fact that the scoring is substantially coincident with the edge of the shell 3,. and ashearing action across the edge-of the metal occurs upon the inward The particular construction of the terminals 4 and 5 may be modified in many ways, and those shown are indicated by way of example. Again the casing 6 may be cupped at the terminal end of the battery,

the cupped end of the casing, instead of the independent cap 8, form n the seal.

. Various other modificat ons of construetion will readily occur to those dealing with the problem without departing from what I clalm as my invention.

1. In a dry battery, a batter body having' a metallic shell, and at one en a pa1r of terminals 'projectmg beyond the end of the sulatin casing surrounding the s all and extending beyond and sealing said termiweakened substantially in the plane of e shell and to facilitate the rupture of the wall of the'casing'to permit the removal of the terminal enclosing end and the exposure of the terminals for connection thereto.

2. In' a d battery, a battery body havm 'ble in a metallic s ell, and at one end a pair 0 I terminals projecting beyond the end of the shell, in combination with a fran 'ble insulating casing surronndinlg the she and extending beyond and sea mg said terminals against access, said casing being scored substantially in the plane of the shell and to facilitate the ru ture ofthe wall of the cas ing to permit t e removal of the terminal enclosin end and the exposure of the terminals or connection thereto, said terminal enclosing end of the casing bein spaced from the body of thebattery and is;

said terminals.

a central supportmgsring surrounding one of bination. with a tubular insulating jecting beyond the end of the shellflfi-comcasing of frangible material surroundin the shell and extendingbeyond thewi-re term1nals,together with a terminal sealing. cap having a flange sleeving said end of the casingand sealed thereto, the flange of said capextending sub st-antially to the plane of the end of the battery shell, and the insulating casing being scored substantially at theedge of said cap flange to facilitate the rupture of the casing by inward pressure applied at a point beyond the end of the battery shell to permit the removal of the cap and'the sleeved portion of the casing-to exposethe terminals for connection thereto.

4. A. dry battery comprising a metallic shell, and terminals at one end thereof proecting beyond'the end of the shell, in com ination with an insulating casing of frangible material comprising a jacket surrounding the battery shell, and a cap closure for the terminal end of the battery, said cap sleeving upon the insulating jacket for the shell and being sealed thereto to prevent access to the battery terminals, said casing being weakened substantially in the plane of the end. of the battery shell to facilitate the rupture and removal of the cap portion of the casing to expose the terminals.

In testimony whereof I have\signed my name to thisspecification.

ALLEN T. BALDWIN. 

